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Question-1
The appearance of colour in solid alkali metal halides is generally due to:
(A)
F - centres
(B)
Schottky defect
(C)
Frenkel defect
(D)
Interstitial positions
Question-2
A liquid can exist only:
(A)
Between triple point and critical temperature.
(B)
At any temperature above the melting point.
(C)
Between melting point and critical temperature.
(D)
Between boiling and melting temperature.
Question-3
When electrons are trapped into the crystalline anion vacancy, the defect is known as:
(A)
Schottky defect
(B)
Stoichiometric defect
(C)
Frenkel defect
(D)
F - centres
Question-4
Absolute zero is defined as the temperature:
(A)
At which all molecular motion ceases
(B)
At which liquid helium boils.
(C)
At which ether boils.
(D)
All of the above
Question-5
The beans are cooked earlier in pressure cooker because:
(A)
Boiling point increases with increasing pressure.
(B)
Boiling point decreases with increasing pressure
(C)
Extra pressure of pressure cooker softens the beans
(D)
Internal energy is not lost while cooking in pressure cooker.
Question-6
Zn converts from its melted state to its solid state. It has HCP structure. Then find out the number of nearest atoms.
(A)
6
(B)
8
(C)
12
(D)
4
Question-7
In the fluorite structure, the coordination number of Ca
2+
ion is :
(A)
4
(B)
6
(C)
8
(D)
3
Question-8
Most crystals show good cleavage because their atoms, ions or molecules are:
(A)
Weakly bonded together
(B)
Strongly bonded together
(C)
Spherically symmetrical
(D)
Arranged in planes
Question-9
If a gas expands at constant temperature, it indicates that:
(A)
Kinetic energy of molecules decrease
(B)
Pressure of the gas increases
(C)
Kinetic energy of molecules remains the same
(D)
Number of the molecules of gas increase
Question-10
In a closed flask of 5 L, 1.0 g of H
2
is heated from 300 to 600 K. Which statement is not correct?
(A)
Pressure of the gas increases
(B)
The rate of collision increases
(C)
The number of moles of gas increases
(D)
The energy of gaseous molecules increases
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Cambridge Secondary Grade 9
IGCSE
Practice in Related Chapters
Nature of Matter
Elements and Compounds
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Mixtures and Separating Techniques
Particle Theory
Periodic Patterns
Chemical Change
Chemical Analysis and Experimentation
Patterns and Properties of Non-metals
Petrochemicals and Polymers
Industrial Inorganic Chemistry
Organic Chemistry
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